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(No Model.) 7 2Sheets-Sheet 1. I

E. BAOKUS. Hot Water Heating Apparatus. No. 238,077. Patented Feb.22,1881.

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7 (No Model.) j2Sheets-Sheet 2.

E. BACKUS. Hot Water Heating Apparatus.

Patented Feb. 22,1881.

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EDWARD BACKUS, OF ROCHESTER, NEW YORK, ASSIGNOR TO MARY BAOKUS, OF SAMEPLACE.

HOT-WATER H EATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 238,077, dated February22, 1881.

Application filed March 29, 1880.

To all whom it may concern:

'Be it known that I, EDWARD BAGKUS, of Rochester, New York, haveinvented an Improved Hot-Water Heating Apparatus, of which the followingis a specification, reference being had to the annexed'drawings, inwhich Figurelis a front elevation, partly in section, of my improvedheating apparatus. Fig. 2 is a longitudinal central section of the same,

showing the parts to right of the central plane combination of a furnacehaving an exterior air-heating surface, an air-passage leading to saidsurface, a water-heater located in the firechamber, asecond water-heaterconnected with the first and located in the passage for the outgoingproducts of combustion, and a hot-water radiator located in theair-passage at a point in advance of the furnace and connected with thewater-heaters.

Myimproved heating apparatus is shown in the accompanying drawings, inwhich A is the furnace, B B the radiators, G the inclosing brick-work,and D D D the hot-air pipes. The course of the air through the apparatusis represented by the arrows in Fig. l. p

The furnace A is constructed of sheet-iron, having a rounded uppersurface, and having at either end heads or plates, through whichopenings are made for the entrance of the coal, the dischargeof ashes,and of the heated gases to the chimney or flue.

The fire-place door E and the ash-pit door F are preferably attached toa casting which projects through the casing of brick-work, and isriveted at its inner margin to the head placed at the front end of thefurnace.

The direct-draft pipe Gr and the indirect- (No model.)

draft pipe H are connected with the rear furnace-head and communicatewith the chimney or flue I. p

The furnace is divided about midway of its length by a verticalpartition, L, which is bent backward, so as to afford support to therear end of the grate-bars K, Fig. 2, and the firebrick a at the backend of the fire-space. The sides of the fire-space are also lined withfirebrick b b, Fig. 2. The partition L rises some distance above thegrate bars, so that the heated gases produced by the combustion arecompelled to pass over the top of the partitionand downward through thecoils of pipe M M on their way to the indirect-draft pipe H.

Within the fire-chamber and along the inside of the furnace are placedthe coils of pipe N N, which communicate respectively at their lowerends with the upper parts of the coils M M. The upper part of the coil Ncommunicates, through the pipe a, with the top of the radiator B. Thelower part of the radiator B communicates, through the pipe P, with thelower-portion of the coilM. Provision is thus made for obtaining acirculation of water from the lower and coolest portion of the radiatorthrough the coil M, which isbut moderately heated by the outgoingproducts of combustion, to the hot coil N, whence it is returned to thetop of the radiator B by the pipe 0.

b, Fig. 1, is stand-pipe, which connects with the oirculatingpipes a a,and rises to any desired distance above the heating apparatus, for thepurpose of maintaining the requisite pressure on the pipes andradiators.

I prefer to construct my improved heating apparatus with radiators andair-passages on each side of thefurnace, as represented in Figs. 1 and3. The principle of my invention is, however, fully carried out by oneradiator and a furnace.

In theaccompanyin g drawings my improved heating apparatus isrepresented with radiators and air-passages located on each side of thefurnace, the radiators. being marked respectively B and B, the verticalpartitions c and e, R and R, the fire-chamber coils Nand N, thecirculating-pipes a and a, and the coils in the gas-outlet passage MandM.

The operation of the parts is the same on each side of the furnace, theradiator B coinmunicating through the circulating-pipe a.

' with the coil N, and this with the coil M,

and this coil with M, whence the pipe P extends to the radiator B, Fig.3.

The furnace is inclosed in a suitable brickwork chamber, 0, havingsufficient interior capacity for the radiators B B and the airpassages.The air enters through suitable openings at the base of the verticalside walls, (designated (1, Fig. 1,) and is heated moderately at firstby passing through the radiator B, which consists of a number of sheetIhetal heaters fastened together at top and bottom by suitable joints.The inner heater of the radiator B acts as a partition to compel the airto pass between the other heaters, and it rests at bottom on thebrick-work partition 6. After passing through the radiator B the airdescends along the partition It, and, passing through the openingf atthe base of this partition, comes in contact with the hot exteriorsurface of the furnace, by which it is fullyheated,and thence isdistributed through the pipes D to the various apartments to be heated.

In order to reduce the temperature of the outgoing products ofcombustion as much as possible, they are caused to pass downward throughthe coils of pipe M M on their way to the chimney. ()ne of these coilsis connected with the radiator on one side of the furnace and the otherwith the radiator on the other side thereof.

It will be perceived that in my construction the coldest water'i. a,that which comes from the bottom of the radiators-passing into the lowerpart of the coils M M in the exit furnacepassage, is brought in contactwith the coolest outgoing gases--a condition essential to theabstraction of the greatest amount ofheat from them; and it will also beseen that as the water circulates onward on its way back to theradiator, it is brought successively in contact with sources of heat ofincreasing tern perature, until it finally passes alongside of the fireitself, in order to prevent the fire-place from overheating.

The lower part of the radiator is connected with the lower portion ofthe heating-coil or other suitable water-heatin g device within thefurnace, and the upper portion of the radiator with the upper end of thecoil, in order to secure the proper circulation.

I am aware that air has been heated by admitting it directly between afire-pot on one side and a hot-water coil on the other; also, that airhas been admitted past a hot water coil at the base of a furnacedirectly upward against the exterior of the furnace-body.

I am also aware that various other forms of apparatus have been employedfor the heating of air.

I claim 1. The combination of the furnace having an exterior airheatingsurface, an air-passage leading to said surface, a water-heater locatedin the fire-chamber, a second water-heater connected with the first andlocated in the passage for the outgoing products of combustion, and ahot-water radiator located in the air-passage at a point in advance ofthe furnace and connected with the first and second water-heaters, asdescribed.

2. The combination of furnace A, the airpassage containing the dependingwall B and wall a, the radiator B, located in the passage upon wall 0,and the two water-heaters, M and N, located in the furnace and connectedwith each other and with the radiator, as shown.

3. The improved furnace for heating air by a combination of direct andindirect radiation, the same consisting of the combination of theoutside horizontal furnace-body, the grate, the walls a and L, above andbelow the grate, respectively, the water-coil N, located in thefirechamber, and the connected coil M, located behind wall L in the baseof the furnace.

EDWARD BAGKUS.

Witnesses:

GEO. B. SELDEN, W. M. REBAsZ, Jr.

